The half frame camera is a really wonderful and different format. It is the analog equivalent of the digital point & shoot. At 72 exposures/36 exposure roll, there's really no holding back. Armed with a half-frame SLR, anything and everything is fair game. Shooting with my Olympus Pen FT, and its double-stroke film advance, makes me feel like some 1970's hipster revelling in his cutting edge state-of-the-art doofus gear.
Printing half-frames normally usually results in images like the ones below.
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Sure one could scan and size the individual "frames," but the side by side look is so inherently "cool"—like two frames from a 16mm movie, that breaking up the pairings is too hard to do.
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Everything takes on such an unusual and cinematic look.
If you're interested in seeing some other photographers who shoot half-frame, check out Keith Goldstein there on pbase and on RFF as Kbg32.